1.1.0 / 2013-10-20
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 * add `.addEventListener()` and `.removeEventListener()` aliases

1.0.1 / 2013-06-27
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 * add support for legacy ie

1.0.0 / 2013-02-26
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  * add `.off()` support for removing all listeners

0.0.6 / 2012-10-08
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  * add `this._callbacks` initialization to prevent funky gotcha

0.0.5 / 2012-09-07
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  * fix `Emitter.call(this)` usage

0.0.3 / 2012-07-11
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  * add `.listeners()`
  * rename `.has()` to `.hasListeners()`

0.0.2 / 2012-06-28
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  * fix `.off()` with `.once()`-registered callbacks
